~# screen /dev/ttyUSB1 ATZ (Should return OK) AT+ZOPRT=3D5 (Should return OK) AT+ZCDRUN=3D8 (Should return Close autorun state result(0:FAIL 1:SUCCESS)= :1) Ctrl-A k y (To kill the window and exit screen) The device will now be in plain of modem mode. Enjoy. To turn CDRUN back on, rerun the above commands with CDRUN=3D9 instead or C= DRUN=3D8. - Karl